"They thought that it was the only way to solve the issues they were dealing with in relation to the apartment they'd just bought – a very badly arranged dwelling that didn't fit their needs at all."

"They wanted to have an apartment that could adapt to host a different number of people depending on the time of the year, but they didn't want to have their space divided into a lot of small rooms," he added.

"The main motivation for us when we initiated the project was to be able to offer a response to the problems that a large amount of people find today – that their home is made according to housing standards that became obsolete a long time ago," Pérez said.

"Most people living in cities can't even afford a home with one bedroom, and our lives change much faster than our houses are able to cope with," he added.

"We think that it should be our houses that adapt to us and to the changes in our lives – not us having to adapt to a space that is not capable to change."